Omron NX-EIC202 - TCP;UDP Message Service; A-2-1 System Configuration for Using the TCP;UDP Message Service; System Configuration for Using the TCP;UDP Message Service

Appendices
A - 34
NX-series EtherNet/IP Coupler Unit User’s Manual (W536)
A-2 TCP/UDP Message Service
The EtherNet/IP Coupler Unit supports a TCP/UDP message service.
You can use the TCP/UDP message service from a PLC or general-purpose PC that does not support
the EtherNet/IP protocol to make settings in EtherNet/IP Slave Terminals, control I/O, and perform trou-
bleshooting.
You can send TCP/UDP commands from a device that supports the TCP/IP protocol or UDP/IP proto-
col (socket communications) to access CIP objects in the EtherNet/IP Coupler Unit and thereby control
the EtherNet/IP Slave Terminal. For details on request commands, refer to A-1 Supported CIP Objects
on page A-3.
You can use DIP switch pin 3 to enable and disable the TCP/UDP message service. For details, refer to
4-3-2 DIP Switch on page 4-9.
Precautions for Correct Use
• With NX-EIC202 version 1.1 or earlier, reading input data and writing output data are only
possible when a Safety Control Unit is included in the Slave Terminal. Refer to the NX-series
Safety Control Unit User’s Manual (Cat. No. Z930) for more information.
• For NX-EIC202 version 1.2 or later, you can use the Change NX Unit service to access I/O
data in the EtherNet/IP Coupler Unit or NX Units. Refer toA-3-6 Reading and Writing I/O Data
for EtherNet/IP Slave Terminals on page A-49 for detailed procedures to read and write I/O
data.
For a device that does not support EtherNet/IP, you can use the TCP/UDP message service as an alter-
native to EtherNet/IP communications. Devices such as PCs or other controllers can send and receive
Omron specific TCP/IP commands and UDP/IP commands to access CIP objects (refer to A-1 Sup-
ported CIP Objects on page A-3 for details on CIP objects) as shown in the image below.
A-2-1 System Configuration for Using the TCP/UDP Message Service